1/*-
2 * Copyright (c) 1997, 1998, 1999 Nicolas Souchu, Michael Smith
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 *
27 */
28
29#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 1997, 1998, 1999 Nicolas Souchu, Michael Smith
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 *
27 */
28
29#include <sys/cdefs.h>
|
31#include "opt_ppb_1284.h"
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/module.h>
36#include <sys/bus.h>
37#include <sys/conf.h>
38#include <sys/kernel.h>
39#include <sys/uio.h>
40#include <sys/fcntl.h>
41
42#include <machine/bus.h>
43#include <machine/resource.h>
44#include <sys/rman.h>
45
46#include <dev/ppbus/ppbconf.h>
47#include <dev/ppbus/ppb_msq.h>
48
49#ifdef PERIPH_1284
50#include <dev/ppbus/ppb_1284.h>
51#endif
52
53#include <dev/ppbus/ppi.h>
54
55#include "ppbus_if.h"
56
57#include <dev/ppbus/ppbio.h>
58
59#define BUFSIZE 512
60
61struct ppi_data {
62
63 int ppi_unit;
64 int ppi_flags;
65#define HAVE_PPBUS (1<<0)
66#define HAD_PPBUS (1<<1)
67
68 int ppi_count;
69 int ppi_mode; /* IEEE1284 mode */
70 char ppi_buffer[BUFSIZE];
71
72#ifdef PERIPH_1284
73 struct resource *intr_resource; /* interrupt resource */
74 void *intr_cookie; /* interrupt registration cookie */
75#endif /* PERIPH_1284 */
76};
77
78#define DEVTOSOFTC(dev) \
79 ((struct ppi_data *)device_get_softc(dev))
80#define UNITOSOFTC(unit) \
81 ((struct ppi_data *)devclass_get_softc(ppi_devclass, (unit)))
82#define UNITODEVICE(unit) \
83 (devclass_get_device(ppi_devclass, (unit)))
84
85static devclass_t ppi_devclass;
86
87static d_open_t ppiopen;
88static d_close_t ppiclose;
89static d_ioctl_t ppiioctl;
90static d_write_t ppiwrite;
91static d_read_t ppiread;
92
93static struct cdevsw ppi_cdevsw = {
94 .d_version = D_VERSION,
95 .d_flags = D_NEEDGIANT,
96 .d_open = ppiopen,
97 .d_close = ppiclose,
98 .d_read = ppiread,
99 .d_write = ppiwrite,
100 .d_ioctl = ppiioctl,
101 .d_name = "ppi",
102};
103
104#ifdef PERIPH_1284
105
106static void
107ppi_enable_intr(device_t ppidev)
108{
109 char r;
110 device_t ppbus = device_get_parent(ppidev);
111
112 r = ppb_rctr(ppbus);
113 ppb_wctr(ppbus, r | IRQENABLE);
114
115 return;
116}
117
118static void
119ppi_disable_intr(device_t ppidev)
120{
121 char r;
122 device_t ppbus = device_get_parent(ppidev);
123
124 r = ppb_rctr(ppbus);
125 ppb_wctr(ppbus, r & ~IRQENABLE);
126
127 return;
128}
129
130#endif /* PERIPH_1284 */
131
132static void
133ppi_identify(driver_t *driver, device_t parent)
134{
135
136 device_t dev;
137
138 dev = device_find_child(parent, "ppi", -1);
139 if (!dev)
140 BUS_ADD_CHILD(parent, 0, "ppi", -1);
141}
142
143/*
144 * ppi_probe()
145 */
146static int
147ppi_probe(device_t dev)
148{
149 struct ppi_data *ppi;
150
151 /* probe is always ok */
152 device_set_desc(dev, "Parallel I/O");
153
154 ppi = DEVTOSOFTC(dev);
155
156 return (0);
157}
158
159/*
160 * ppi_attach()
161 */
162static int
163ppi_attach(device_t dev)
164{
165#ifdef PERIPH_1284
166 uintptr_t irq;
167 int zero = 0;
168 struct ppi_data *ppi = DEVTOSOFTC(dev);
169
170 /* retrive the irq */
171 BUS_READ_IVAR(device_get_parent(dev), dev, PPBUS_IVAR_IRQ, &irq);
172
173 /* declare our interrupt handler */
174 ppi->intr_resource = bus_alloc_resource(dev, SYS_RES_IRQ,
175 &zero, irq, irq, 1, RF_ACTIVE);
176#endif /* PERIPH_1284 */
177
178 make_dev(&ppi_cdevsw, device_get_unit(dev), /* XXX cleanup */
179 UID_ROOT, GID_WHEEL,
180 0600, "ppi%d", device_get_unit(dev));
181
182 return (0);
183}
184
185#ifdef PERIPH_1284
186/*
187 * Cable
188 * -----
189 *
190 * Use an IEEE1284 compliant (DB25/DB25) cable with the following tricks:
191 *
192 * nStrobe <-> nAck 1 <-> 10
193 * nAutofd <-> Busy 11 <-> 14
194 * nSelectin <-> Select 17 <-> 13
195 * nInit <-> nFault 15 <-> 16
196 *
197 */
198static void
199ppiintr(void *arg)
200{
201 device_t ppidev = (device_t)arg;
202 device_t ppbus = device_get_parent(ppidev);
203 struct ppi_data *ppi = DEVTOSOFTC(ppidev);
204
205 ppi_disable_intr(ppidev);
206
207 switch (ppb_1284_get_state(ppbus)) {
208
209 /* accept IEEE1284 negotiation then wakeup a waiting process to
210 * continue negotiation at process level */
211 case PPB_FORWARD_IDLE:
212 /* Event 1 */
213 if ((ppb_rstr(ppbus) & (SELECT | nBUSY)) ==
214 (SELECT | nBUSY)) {
215 /* IEEE1284 negotiation */
216#ifdef DEBUG_1284
217 printf("N");
218#endif
219
220 /* Event 2 - prepare for reading the ext. value */
221 ppb_wctr(ppbus, (PCD | STROBE | nINIT) & ~SELECTIN);
222
223 ppb_1284_set_state(ppbus, PPB_NEGOCIATION);
224
225 } else {
226#ifdef DEBUG_1284
227 printf("0x%x", ppb_rstr(ppbus));
228#endif
229 ppb_peripheral_terminate(ppbus, PPB_DONTWAIT);
230 break;
231 }
232
233 /* wake up any process waiting for negotiation from
234 * remote master host */
235
236 /* XXX should set a variable to warn the process about
237 * the interrupt */
238
239 wakeup(ppi);
240 break;
241 default:
242#ifdef DEBUG_1284
243 printf("?%d", ppb_1284_get_state(ppbus));
244#endif
245 ppb_1284_set_state(ppbus, PPB_FORWARD_IDLE);
246 ppb_set_mode(ppbus, PPB_COMPATIBLE);
247 break;
248 }
249
250 ppi_enable_intr(ppidev);
251
252 return;
253}
254#endif /* PERIPH_1284 */
255
256static int
257ppiopen(struct cdev *dev, int flags, int fmt, struct thread *td)
258{
259 u_int unit = minor(dev);
260 struct ppi_data *ppi = UNITOSOFTC(unit);
261 device_t ppidev = UNITODEVICE(unit);
262 device_t ppbus = device_get_parent(ppidev);
263 int res;
264
265 if (!ppi)
266 return (ENXIO);
267
268 if (!(ppi->ppi_flags & HAVE_PPBUS)) {
269 if ((res = ppb_request_bus(ppbus, ppidev,
270 (flags & O_NONBLOCK) ? PPB_DONTWAIT :
271 (PPB_WAIT | PPB_INTR))))
272 return (res);
273
274 ppi->ppi_flags |= HAVE_PPBUS;
275
276#ifdef PERIPH_1284
277 if (ppi->intr_resource) {
278 /* register our interrupt handler */
| 31#include "opt_ppb_1284.h"
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/module.h>
36#include <sys/bus.h>
37#include <sys/conf.h>
38#include <sys/kernel.h>
39#include <sys/uio.h>
40#include <sys/fcntl.h>
41
42#include <machine/bus.h>
43#include <machine/resource.h>
44#include <sys/rman.h>
45
46#include <dev/ppbus/ppbconf.h>
47#include <dev/ppbus/ppb_msq.h>
48
49#ifdef PERIPH_1284
50#include <dev/ppbus/ppb_1284.h>
51#endif
52
53#include <dev/ppbus/ppi.h>
54
55#include "ppbus_if.h"
56
57#include <dev/ppbus/ppbio.h>
58
59#define BUFSIZE 512
60
61struct ppi_data {
62
63 int ppi_unit;
64 int ppi_flags;
65#define HAVE_PPBUS (1<<0)
66#define HAD_PPBUS (1<<1)
67
68 int ppi_count;
69 int ppi_mode; /* IEEE1284 mode */
70 char ppi_buffer[BUFSIZE];
71
72#ifdef PERIPH_1284
73 struct resource *intr_resource; /* interrupt resource */
74 void *intr_cookie; /* interrupt registration cookie */
75#endif /* PERIPH_1284 */
76};
77
78#define DEVTOSOFTC(dev) \
79 ((struct ppi_data *)device_get_softc(dev))
80#define UNITOSOFTC(unit) \
81 ((struct ppi_data *)devclass_get_softc(ppi_devclass, (unit)))
82#define UNITODEVICE(unit) \
83 (devclass_get_device(ppi_devclass, (unit)))
84
85static devclass_t ppi_devclass;
86
87static d_open_t ppiopen;
88static d_close_t ppiclose;
89static d_ioctl_t ppiioctl;
90static d_write_t ppiwrite;
91static d_read_t ppiread;
92
93static struct cdevsw ppi_cdevsw = {
94 .d_version = D_VERSION,
95 .d_flags = D_NEEDGIANT,
96 .d_open = ppiopen,
97 .d_close = ppiclose,
98 .d_read = ppiread,
99 .d_write = ppiwrite,
100 .d_ioctl = ppiioctl,
101 .d_name = "ppi",
102};
103
104#ifdef PERIPH_1284
105
106static void
107ppi_enable_intr(device_t ppidev)
108{
109 char r;
110 device_t ppbus = device_get_parent(ppidev);
111
112 r = ppb_rctr(ppbus);
113 ppb_wctr(ppbus, r | IRQENABLE);
114
115 return;
116}
117
118static void
119ppi_disable_intr(device_t ppidev)
120{
121 char r;
122 device_t ppbus = device_get_parent(ppidev);
123
124 r = ppb_rctr(ppbus);
125 ppb_wctr(ppbus, r & ~IRQENABLE);
126
127 return;
128}
129
130#endif /* PERIPH_1284 */
131
132static void
133ppi_identify(driver_t *driver, device_t parent)
134{
135
136 device_t dev;
137
138 dev = device_find_child(parent, "ppi", -1);
139 if (!dev)
140 BUS_ADD_CHILD(parent, 0, "ppi", -1);
141}
142
143/*
144 * ppi_probe()
145 */
146static int
147ppi_probe(device_t dev)
148{
149 struct ppi_data *ppi;
150
151 /* probe is always ok */
152 device_set_desc(dev, "Parallel I/O");
153
154 ppi = DEVTOSOFTC(dev);
155
156 return (0);
157}
158
159/*
160 * ppi_attach()
161 */
162static int
163ppi_attach(device_t dev)
164{
165#ifdef PERIPH_1284
166 uintptr_t irq;
167 int zero = 0;
168 struct ppi_data *ppi = DEVTOSOFTC(dev);
169
170 /* retrive the irq */
171 BUS_READ_IVAR(device_get_parent(dev), dev, PPBUS_IVAR_IRQ, &irq);
172
173 /* declare our interrupt handler */
174 ppi->intr_resource = bus_alloc_resource(dev, SYS_RES_IRQ,
175 &zero, irq, irq, 1, RF_ACTIVE);
176#endif /* PERIPH_1284 */
177
178 make_dev(&ppi_cdevsw, device_get_unit(dev), /* XXX cleanup */
179 UID_ROOT, GID_WHEEL,
180 0600, "ppi%d", device_get_unit(dev));
181
182 return (0);
183}
184
185#ifdef PERIPH_1284
186/*
187 * Cable
188 * -----
189 *
190 * Use an IEEE1284 compliant (DB25/DB25) cable with the following tricks:
191 *
192 * nStrobe <-> nAck 1 <-> 10
193 * nAutofd <-> Busy 11 <-> 14
194 * nSelectin <-> Select 17 <-> 13
195 * nInit <-> nFault 15 <-> 16
196 *
197 */
198static void
199ppiintr(void *arg)
200{
201 device_t ppidev = (device_t)arg;
202 device_t ppbus = device_get_parent(ppidev);
203 struct ppi_data *ppi = DEVTOSOFTC(ppidev);
204
205 ppi_disable_intr(ppidev);
206
207 switch (ppb_1284_get_state(ppbus)) {
208
209 /* accept IEEE1284 negotiation then wakeup a waiting process to
210 * continue negotiation at process level */
211 case PPB_FORWARD_IDLE:
212 /* Event 1 */
213 if ((ppb_rstr(ppbus) & (SELECT | nBUSY)) ==
214 (SELECT | nBUSY)) {
215 /* IEEE1284 negotiation */
216#ifdef DEBUG_1284
217 printf("N");
218#endif
219
220 /* Event 2 - prepare for reading the ext. value */
221 ppb_wctr(ppbus, (PCD | STROBE | nINIT) & ~SELECTIN);
222
223 ppb_1284_set_state(ppbus, PPB_NEGOCIATION);
224
225 } else {
226#ifdef DEBUG_1284
227 printf("0x%x", ppb_rstr(ppbus));
228#endif
229 ppb_peripheral_terminate(ppbus, PPB_DONTWAIT);
230 break;
231 }
232
233 /* wake up any process waiting for negotiation from
234 * remote master host */
235
236 /* XXX should set a variable to warn the process about
237 * the interrupt */
238
239 wakeup(ppi);
240 break;
241 default:
242#ifdef DEBUG_1284
243 printf("?%d", ppb_1284_get_state(ppbus));
244#endif
245 ppb_1284_set_state(ppbus, PPB_FORWARD_IDLE);
246 ppb_set_mode(ppbus, PPB_COMPATIBLE);
247 break;
248 }
249
250 ppi_enable_intr(ppidev);
251
252 return;
253}
254#endif /* PERIPH_1284 */
255
256static int
257ppiopen(struct cdev *dev, int flags, int fmt, struct thread *td)
258{
259 u_int unit = minor(dev);
260 struct ppi_data *ppi = UNITOSOFTC(unit);
261 device_t ppidev = UNITODEVICE(unit);
262 device_t ppbus = device_get_parent(ppidev);
263 int res;
264
265 if (!ppi)
266 return (ENXIO);
267
268 if (!(ppi->ppi_flags & HAVE_PPBUS)) {
269 if ((res = ppb_request_bus(ppbus, ppidev,
270 (flags & O_NONBLOCK) ? PPB_DONTWAIT :
271 (PPB_WAIT | PPB_INTR))))
272 return (res);
273
274 ppi->ppi_flags |= HAVE_PPBUS;
275
276#ifdef PERIPH_1284
277 if (ppi->intr_resource) {
278 /* register our interrupt handler */
|
281 }
282#endif /* PERIPH_1284 */
283 }
284 ppi->ppi_count += 1;
285
286 return (0);
287}
288
289static int
290ppiclose(struct cdev *dev, int flags, int fmt, struct thread *td)
291{
292 u_int unit = minor(dev);
293 struct ppi_data *ppi = UNITOSOFTC(unit);
294 device_t ppidev = UNITODEVICE(unit);
295 device_t ppbus = device_get_parent(ppidev);
296
297 ppi->ppi_count --;
298 if (!ppi->ppi_count) {
299
300#ifdef PERIPH_1284
301 switch (ppb_1284_get_state(ppbus)) {
302 case PPB_PERIPHERAL_IDLE:
303 ppb_peripheral_terminate(ppbus, 0);
304 break;
305 case PPB_REVERSE_IDLE:
306 case PPB_EPP_IDLE:
307 case PPB_ECP_FORWARD_IDLE:
308 default:
309 ppb_1284_terminate(ppbus);
310 break;
311 }
312#endif /* PERIPH_1284 */
313
314 /* unregistration of interrupt forced by release */
315 ppb_release_bus(ppbus, ppidev);
316
317 ppi->ppi_flags &= ~HAVE_PPBUS;
318 }
319
320 return (0);
321}
322
323/*
324 * ppiread()
325 *
326 * IEEE1284 compliant read.
327 *
328 * First, try negotiation to BYTE then NIBBLE mode
329 * If no data is available, wait for it otherwise transfer as much as possible
330 */
331static int
332ppiread(struct cdev *dev, struct uio *uio, int ioflag)
333{
334#ifdef PERIPH_1284
335 u_int unit = minor(dev);
336 struct ppi_data *ppi = UNITOSOFTC(unit);
337 device_t ppidev = UNITODEVICE(unit);
338 device_t ppbus = device_get_parent(ppidev);
339 int len, error = 0;
340
341 switch (ppb_1284_get_state(ppbus)) {
342 case PPB_PERIPHERAL_IDLE:
343 ppb_peripheral_terminate(ppbus, 0);
344 /* FALLTHROUGH */
345
346 case PPB_FORWARD_IDLE:
347 /* if can't negotiate NIBBLE mode then try BYTE mode,
348 * the peripheral may be a computer
349 */
350 if ((ppb_1284_negociate(ppbus,
351 ppi->ppi_mode = PPB_NIBBLE, 0))) {
352
353 /* XXX Wait 2 seconds to let the remote host some
354 * time to terminate its interrupt
355 */
356 tsleep(ppi, PPBPRI, "ppiread", 2*hz);
357
358 if ((error = ppb_1284_negociate(ppbus,
359 ppi->ppi_mode = PPB_BYTE, 0)))
360 return (error);
361 }
362 break;
363
364 case PPB_REVERSE_IDLE:
365 case PPB_EPP_IDLE:
366 case PPB_ECP_FORWARD_IDLE:
367 default:
368 break;
369 }
370
371#ifdef DEBUG_1284
372 printf("N");
373#endif
374 /* read data */
375 len = 0;
376 while (uio->uio_resid) {
377 if ((error = ppb_1284_read(ppbus, ppi->ppi_mode,
378 ppi->ppi_buffer, min(BUFSIZE, uio->uio_resid),
379 &len))) {
380 goto error;
381 }
382
383 if (!len)
384 goto error; /* no more data */
385
386#ifdef DEBUG_1284
387 printf("d");
388#endif
389 if ((error = uiomove(ppi->ppi_buffer, len, uio)))
390 goto error;
391 }
392
393error:
394
395#else /* PERIPH_1284 */
396 int error = ENODEV;
397#endif
398
399 return (error);
400}
401
402/*
403 * ppiwrite()
404 *
405 * IEEE1284 compliant write
406 *
407 * Actually, this is the peripheral side of a remote IEEE1284 read
408 *
409 * The first part of the negotiation (IEEE1284 device detection) is
410 * done at interrupt level, then the remaining is done by the writing
411 * process
412 *
413 * Once negotiation done, transfer data
414 */
415static int
416ppiwrite(struct cdev *dev, struct uio *uio, int ioflag)
417{
418#ifdef PERIPH_1284
419 u_int unit = minor(dev);
420 struct ppi_data *ppi = UNITOSOFTC(unit);
421 device_t ppidev = UNITODEVICE(unit);
422 device_t ppbus = device_get_parent(ppidev);
423 int len, error = 0, sent;
424
425#if 0
426 int ret;
427
428 #define ADDRESS MS_PARAM(0, 0, MS_TYP_PTR)
429 #define LENGTH MS_PARAM(0, 1, MS_TYP_INT)
430
431 struct ppb_microseq msq[] = {
432 { MS_OP_PUT, { MS_UNKNOWN, MS_UNKNOWN, MS_UNKNOWN } },
433 MS_RET(0)
434 };
435
436 /* negotiate ECP mode */
437 if (ppb_1284_negociate(ppbus, PPB_ECP, 0)) {
438 printf("ppiwrite: ECP negotiation failed\n");
439 }
440
441 while (!error && (len = min(uio->uio_resid, BUFSIZE))) {
442 uiomove(ppi->ppi_buffer, len, uio);
443
444 ppb_MS_init_msq(msq, 2, ADDRESS, ppi->ppi_buffer, LENGTH, len);
445
446 error = ppb_MS_microseq(ppbus, msq, &ret);
447 }
448#endif
449
450 /* we have to be peripheral to be able to send data, so
451 * wait for the appropriate state
452 */
453 if (ppb_1284_get_state(ppbus) < PPB_PERIPHERAL_NEGOCIATION)
454 ppb_1284_terminate(ppbus);
455
456 while (ppb_1284_get_state(ppbus) != PPB_PERIPHERAL_IDLE) {
457 /* XXX should check a variable before sleeping */
458#ifdef DEBUG_1284
459 printf("s");
460#endif
461
462 ppi_enable_intr(ppidev);
463
464 /* sleep until IEEE1284 negotiation starts */
465 error = tsleep(ppi, PCATCH | PPBPRI, "ppiwrite", 0);
466
467 switch (error) {
468 case 0:
469 /* negotiate peripheral side with BYTE mode */
470 ppb_peripheral_negociate(ppbus, PPB_BYTE, 0);
471 break;
472 case EWOULDBLOCK:
473 break;
474 default:
475 goto error;
476 }
477 }
478#ifdef DEBUG_1284
479 printf("N");
480#endif
481
482 /* negotiation done, write bytes to master host */
483 while ((len = min(uio->uio_resid, BUFSIZE)) != 0) {
484 uiomove(ppi->ppi_buffer, len, uio);
485 if ((error = byte_peripheral_write(ppbus,
486 ppi->ppi_buffer, len, &sent)))
487 goto error;
488#ifdef DEBUG_1284
489 printf("d");
490#endif
491 }
492
493error:
494
495#else /* PERIPH_1284 */
496 int error = ENODEV;
497#endif
498
499 return (error);
500}
501
502static int
503ppiioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags, struct thread *td)
504{
505 u_int unit = minor(dev);
506 device_t ppidev = UNITODEVICE(unit);
507 device_t ppbus = device_get_parent(ppidev);
508 int error = 0;
509 u_int8_t *val = (u_int8_t *)data;
510
511 switch (cmd) {
512
513 case PPIGDATA: /* get data register */
514 *val = ppb_rdtr(ppbus);
515 break;
516 case PPIGSTATUS: /* get status bits */
517 *val = ppb_rstr(ppbus);
518 break;
519 case PPIGCTRL: /* get control bits */
520 *val = ppb_rctr(ppbus);
521 break;
522 case PPIGEPPD: /* get EPP data bits */
523 *val = ppb_repp_D(ppbus);
524 break;
525 case PPIGECR: /* get ECP bits */
526 *val = ppb_recr(ppbus);
527 break;
528 case PPIGFIFO: /* read FIFO */
529 *val = ppb_rfifo(ppbus);
530 break;
531 case PPISDATA: /* set data register */
532 ppb_wdtr(ppbus, *val);
533 break;
534 case PPISSTATUS: /* set status bits */
535 ppb_wstr(ppbus, *val);
536 break;
537 case PPISCTRL: /* set control bits */
538 ppb_wctr(ppbus, *val);
539 break;
540 case PPISEPPD: /* set EPP data bits */
541 ppb_wepp_D(ppbus, *val);
542 break;
543 case PPISECR: /* set ECP bits */
544 ppb_wecr(ppbus, *val);
545 break;
546 case PPISFIFO: /* write FIFO */
547 ppb_wfifo(ppbus, *val);
548 break;
549 case PPIGEPPA: /* get EPP address bits */
550 *val = ppb_repp_A(ppbus);
551 break;
552 case PPISEPPA: /* set EPP address bits */
553 ppb_wepp_A(ppbus, *val);
554 break;
555 default:
556 error = ENOTTY;
557 break;
558 }
559
560 return (error);
561}
562
563static device_method_t ppi_methods[] = {
564 /* device interface */
565 DEVMETHOD(device_identify, ppi_identify),
566 DEVMETHOD(device_probe, ppi_probe),
567 DEVMETHOD(device_attach, ppi_attach),
568
569 { 0, 0 }
570};
571
572static driver_t ppi_driver = {
573 "ppi",
574 ppi_methods,
575 sizeof(struct ppi_data),
576};
577DRIVER_MODULE(ppi, ppbus, ppi_driver, ppi_devclass, 0, 0);
578MODULE_DEPEND(ppi, ppbus, 1, 1, 1);
| 282 }
283#endif /* PERIPH_1284 */
284 }
285 ppi->ppi_count += 1;
286
287 return (0);
288}
289
290static int
291ppiclose(struct cdev *dev, int flags, int fmt, struct thread *td)
292{
293 u_int unit = minor(dev);
294 struct ppi_data *ppi = UNITOSOFTC(unit);
295 device_t ppidev = UNITODEVICE(unit);
296 device_t ppbus = device_get_parent(ppidev);
297
298 ppi->ppi_count --;
299 if (!ppi->ppi_count) {
300
301#ifdef PERIPH_1284
302 switch (ppb_1284_get_state(ppbus)) {
303 case PPB_PERIPHERAL_IDLE:
304 ppb_peripheral_terminate(ppbus, 0);
305 break;
306 case PPB_REVERSE_IDLE:
307 case PPB_EPP_IDLE:
308 case PPB_ECP_FORWARD_IDLE:
309 default:
310 ppb_1284_terminate(ppbus);
311 break;
312 }
313#endif /* PERIPH_1284 */
314
315 /* unregistration of interrupt forced by release */
316 ppb_release_bus(ppbus, ppidev);
317
318 ppi->ppi_flags &= ~HAVE_PPBUS;
319 }
320
321 return (0);
322}
323
324/*
325 * ppiread()
326 *
327 * IEEE1284 compliant read.
328 *
329 * First, try negotiation to BYTE then NIBBLE mode
330 * If no data is available, wait for it otherwise transfer as much as possible
331 */
332static int
333ppiread(struct cdev *dev, struct uio *uio, int ioflag)
334{
335#ifdef PERIPH_1284
336 u_int unit = minor(dev);
337 struct ppi_data *ppi = UNITOSOFTC(unit);
338 device_t ppidev = UNITODEVICE(unit);
339 device_t ppbus = device_get_parent(ppidev);
340 int len, error = 0;
341
342 switch (ppb_1284_get_state(ppbus)) {
343 case PPB_PERIPHERAL_IDLE:
344 ppb_peripheral_terminate(ppbus, 0);
345 /* FALLTHROUGH */
346
347 case PPB_FORWARD_IDLE:
348 /* if can't negotiate NIBBLE mode then try BYTE mode,
349 * the peripheral may be a computer
350 */
351 if ((ppb_1284_negociate(ppbus,
352 ppi->ppi_mode = PPB_NIBBLE, 0))) {
353
354 /* XXX Wait 2 seconds to let the remote host some
355 * time to terminate its interrupt
356 */
357 tsleep(ppi, PPBPRI, "ppiread", 2*hz);
358
359 if ((error = ppb_1284_negociate(ppbus,
360 ppi->ppi_mode = PPB_BYTE, 0)))
361 return (error);
362 }
363 break;
364
365 case PPB_REVERSE_IDLE:
366 case PPB_EPP_IDLE:
367 case PPB_ECP_FORWARD_IDLE:
368 default:
369 break;
370 }
371
372#ifdef DEBUG_1284
373 printf("N");
374#endif
375 /* read data */
376 len = 0;
377 while (uio->uio_resid) {
378 if ((error = ppb_1284_read(ppbus, ppi->ppi_mode,
379 ppi->ppi_buffer, min(BUFSIZE, uio->uio_resid),
380 &len))) {
381 goto error;
382 }
383
384 if (!len)
385 goto error; /* no more data */
386
387#ifdef DEBUG_1284
388 printf("d");
389#endif
390 if ((error = uiomove(ppi->ppi_buffer, len, uio)))
391 goto error;
392 }
393
394error:
395
396#else /* PERIPH_1284 */
397 int error = ENODEV;
398#endif
399
400 return (error);
401}
402
403/*
404 * ppiwrite()
405 *
406 * IEEE1284 compliant write
407 *
408 * Actually, this is the peripheral side of a remote IEEE1284 read
409 *
410 * The first part of the negotiation (IEEE1284 device detection) is
411 * done at interrupt level, then the remaining is done by the writing
412 * process
413 *
414 * Once negotiation done, transfer data
415 */
416static int
417ppiwrite(struct cdev *dev, struct uio *uio, int ioflag)
418{
419#ifdef PERIPH_1284
420 u_int unit = minor(dev);
421 struct ppi_data *ppi = UNITOSOFTC(unit);
422 device_t ppidev = UNITODEVICE(unit);
423 device_t ppbus = device_get_parent(ppidev);
424 int len, error = 0, sent;
425
426#if 0
427 int ret;
428
429 #define ADDRESS MS_PARAM(0, 0, MS_TYP_PTR)
430 #define LENGTH MS_PARAM(0, 1, MS_TYP_INT)
431
432 struct ppb_microseq msq[] = {
433 { MS_OP_PUT, { MS_UNKNOWN, MS_UNKNOWN, MS_UNKNOWN } },
434 MS_RET(0)
435 };
436
437 /* negotiate ECP mode */
438 if (ppb_1284_negociate(ppbus, PPB_ECP, 0)) {
439 printf("ppiwrite: ECP negotiation failed\n");
440 }
441
442 while (!error && (len = min(uio->uio_resid, BUFSIZE))) {
443 uiomove(ppi->ppi_buffer, len, uio);
444
445 ppb_MS_init_msq(msq, 2, ADDRESS, ppi->ppi_buffer, LENGTH, len);
446
447 error = ppb_MS_microseq(ppbus, msq, &ret);
448 }
449#endif
450
451 /* we have to be peripheral to be able to send data, so
452 * wait for the appropriate state
453 */
454 if (ppb_1284_get_state(ppbus) < PPB_PERIPHERAL_NEGOCIATION)
455 ppb_1284_terminate(ppbus);
456
457 while (ppb_1284_get_state(ppbus) != PPB_PERIPHERAL_IDLE) {
458 /* XXX should check a variable before sleeping */
459#ifdef DEBUG_1284
460 printf("s");
461#endif
462
463 ppi_enable_intr(ppidev);
464
465 /* sleep until IEEE1284 negotiation starts */
466 error = tsleep(ppi, PCATCH | PPBPRI, "ppiwrite", 0);
467
468 switch (error) {
469 case 0:
470 /* negotiate peripheral side with BYTE mode */
471 ppb_peripheral_negociate(ppbus, PPB_BYTE, 0);
472 break;
473 case EWOULDBLOCK:
474 break;
475 default:
476 goto error;
477 }
478 }
479#ifdef DEBUG_1284
480 printf("N");
481#endif
482
483 /* negotiation done, write bytes to master host */
484 while ((len = min(uio->uio_resid, BUFSIZE)) != 0) {
485 uiomove(ppi->ppi_buffer, len, uio);
486 if ((error = byte_peripheral_write(ppbus,
487 ppi->ppi_buffer, len, &sent)))
488 goto error;
489#ifdef DEBUG_1284
490 printf("d");
491#endif
492 }
493
494error:
495
496#else /* PERIPH_1284 */
497 int error = ENODEV;
498#endif
499
500 return (error);
501}
502
503static int
504ppiioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags, struct thread *td)
505{
506 u_int unit = minor(dev);
507 device_t ppidev = UNITODEVICE(unit);
508 device_t ppbus = device_get_parent(ppidev);
509 int error = 0;
510 u_int8_t *val = (u_int8_t *)data;
511
512 switch (cmd) {
513
514 case PPIGDATA: /* get data register */
515 *val = ppb_rdtr(ppbus);
516 break;
517 case PPIGSTATUS: /* get status bits */
518 *val = ppb_rstr(ppbus);
519 break;
520 case PPIGCTRL: /* get control bits */
521 *val = ppb_rctr(ppbus);
522 break;
523 case PPIGEPPD: /* get EPP data bits */
524 *val = ppb_repp_D(ppbus);
525 break;
526 case PPIGECR: /* get ECP bits */
527 *val = ppb_recr(ppbus);
528 break;
529 case PPIGFIFO: /* read FIFO */
530 *val = ppb_rfifo(ppbus);
531 break;
532 case PPISDATA: /* set data register */
533 ppb_wdtr(ppbus, *val);
534 break;
535 case PPISSTATUS: /* set status bits */
536 ppb_wstr(ppbus, *val);
537 break;
538 case PPISCTRL: /* set control bits */
539 ppb_wctr(ppbus, *val);
540 break;
541 case PPISEPPD: /* set EPP data bits */
542 ppb_wepp_D(ppbus, *val);
543 break;
544 case PPISECR: /* set ECP bits */
545 ppb_wecr(ppbus, *val);
546 break;
547 case PPISFIFO: /* write FIFO */
548 ppb_wfifo(ppbus, *val);
549 break;
550 case PPIGEPPA: /* get EPP address bits */
551 *val = ppb_repp_A(ppbus);
552 break;
553 case PPISEPPA: /* set EPP address bits */
554 ppb_wepp_A(ppbus, *val);
555 break;
556 default:
557 error = ENOTTY;
558 break;
559 }
560
561 return (error);
562}
563
564static device_method_t ppi_methods[] = {
565 /* device interface */
566 DEVMETHOD(device_identify, ppi_identify),
567 DEVMETHOD(device_probe, ppi_probe),
568 DEVMETHOD(device_attach, ppi_attach),
569
570 { 0, 0 }
571};
572
573static driver_t ppi_driver = {
574 "ppi",
575 ppi_methods,
576 sizeof(struct ppi_data),
577};
578DRIVER_MODULE(ppi, ppbus, ppi_driver, ppi_devclass, 0, 0);
579MODULE_DEPEND(ppi, ppbus, 1, 1, 1);
|